<template>
  <div>
    <div>
      <el-input style="width: 200px;margin:0 15px" placeholder="查询标题" v-model="title"></el-input>
      <el-button type="primary" @click="load(1)" plain>查询</el-button>
      <el-button type="primary" @click="reset" plain>重置</el-button>
    </div>
    <div style="margin: 10px 0">
      <el-button type="primary" plain @click="handleAdd">新增</el-button>
      <el-button type="danger" plain @click="doubleDelete">批量删除</el-button>
    </div>
    <el-table :data="tableData" stripe :header-cell-style="{backgroundColor:'aliceblue',color:'#666'}"
              @selection-change="handleSelectChange">
      <el-table-column type="selection" width="55" align="center">
      </el-table-column>
      <el-table-column label="序号" prop="id"></el-table-column>
      <el-table-column label="标题" prop="title"></el-table-column>
      <el-table-column label="内容" prop="content" show-overflow-tooltip></el-table-column>
      <el-table-column label="发布人" prop="user"></el-table-column>
      <el-table-column label="发布时间" prop="time"></el-table-column>
      <el-table-column label="是否公开">
        <template v-slot="scope">
          <el-switch v-model="scope.row.open" @change="changeOpen(scope.row)"></el-switch>
        </template>
      </el-table-column>
      <el-table-column label="操作" align="center" width="180px">
        <template v-slot="scope">
          <div>
            <el-button size="small" type="primary" @click="handleEdit(scope.row)">编辑</el-button>
            <el-button size="small" type="danger" @click="del(scope.row.id)">删除</el-button>
          </div>
        </template>
      </el-table-column>
    </el-table>
    <div style="margin:10px 0">
      <el-pagination
          @current-change="handleCurrentChange"
          :current-page="pageNum"
          :page-size="pageSize"
          layout="total,prev, pager, next"
          :total="total">
      </el-pagination>
    </div>
    <el-dialog title="新增公告" :visible.sync="formVisible" width="30%" :close-on-click-modal="false">
      <el-form :model="form" label-width="80px" style="padding-right: 50px" :rules="rules" ref="formRef">
        <el-form-item label="标题" prop="title">
          <el-input v-model="form.title"></el-input>
        </el-form-item>
        <el-form-item label="内容" prop="content">
          <el-input type="textarea" v-model="form.content"></el-input>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="formVisible = false">取消</el-button>
        <el-button type="primary" @click="save">确定</el-button>
      </div>
    </el-dialog>

  </div>
</template>

<script>
import request from "@/utils/request";

export default {
  name: "Notice",
  data() {
    return {
      user: JSON.parse(localStorage.getItem('base-user') || '{}'),
      tableData: [],//所有数据
      pageNum: 1,//当前页码
      pageSize: 6,//每页显示个数
      username: '',
      title: '',
      total: 0,
      formVisible: false,
      form: {},
      rules: {
        title: [
          {required: true, message: '请输入标题', trigger: 'blur'}
        ],
        content: [
          {required: true, message: '请输入内容', trigger: 'blur'}
        ],
      },
      ids: [],
      content: '',
    }
  },
  created() {
    this.load()
  },
  methods: {
    changeOpen(form) {//更新数据到数据库
      this.form = JSON.parse(JSON.stringify(form))
      this.sendSaveRequest()
    },
    doubleDelete() {
      if (!this.ids.length) {
        this.$message.warning("请选择数据")
        return
      }
      this.$confirm("确认批量删除这些数据么", "确认删除", {type: "warning"}).then(response => {
        this.$request.delete('/notice/delete/double', {data: this.ids}).then(res => {
          if (res.code === "200") {//操作成功
            this.$message.success("操作成功")
            this.load(1)
          } else {
            this.$message.error(res.msg)
          }
        })
      }).catch(() => {
      })
    },
    handleSelectChange(rows) {
      this.ids = rows.map(v => v.id)
    },
    del(id) {
      this.$confirm("确认删除么", "确认删除", {type: "warning"}).then(response => {
        this.$request.delete('/notice/delete/' + id).then(res => {
          if (res.code === "200") {//操作成功
            this.$message.success("操作成功")
            this.load(1)
          } else {
            this.$message.error(res.msg)
          }
        })
      }).catch(() => {
      })
    },
    handleEdit(row) {//编辑数据
      this.form = JSON.parse(JSON.stringify(row)) //给form对象赋值，注意要深拷贝数据
      this.formVisible = true
    },
    handleAdd() {//新增数据
      this.form = {}//点击新增数据的时候首先清空表
      this.formVisible = true//打开弹窗
    },
    sendSaveRequest() {
      this.$request({
        url: this.form.id ? '/notice/update' : '/notice/add',
        method: this.form.id ? 'PUT' : 'POST',
        data: this.form
      }).then(res => {
        if (res.code === '200') {
          this.$message.success('保存成功')
          this.load(1)
          this.formVisible = false
        } else {
          this.$message.error(res.msg)//输出错误信息
        }
      })
    },
    save() { //保存按钮触发逻辑，触发新增或更新
      this.$refs.formRef.validate((valid) => {
        if (valid) {
          this.sendSaveRequest()
        }
      })
    },
    reset() {
      this.title = ''
      this.load()
    },
    handleCurrentChange(pageNum) {
      this.load(pageNum)
    },
    load(pageNum) {  //分页查询
      if (pageNum) this.pageNum = pageNum
      this.$request.get('/notice/selectByPage', {
        params: {
          pageNum: this.pageNum,
          pageSize: this.pageSize,
          title: this.title,
        }
      }).then(res => {
        // 检查 res.data 是否为 null 或 undefined
        if (res.data === null || res.data === undefined) {
          // 处理错误情况，例如显示错误消息或清空表格数据
          console.error('未获取到数据');
          this.tableData = [];
          this.total = 0;
        } else {
          // 正常处理数据
          this.tableData = res.data.records;
          this.total = res.data.total;
        }
      }).catch(error => {
        // 处理请求错误
        console.error('请求数据出错:', error);
        // 可以根据需要设置一些错误处理逻辑，比如显示错误消息
      });
    },
  }
}
</script>

<style>
.el-tooltip__popper{
  max-width: 350px ;
}
</style>